SXDOOL 120 mm 1000 RPM 50 CFM 11 dB 3-pin case fan

120 mm ultra-quiet case fan

This 120 mm fan runs at 1000 RPM and moves up to 50 CFM while producing only 11 dB of noise. It is built for chassis cooling and as a replacement for 12 cm power-supply fans in high-reliability server applications. The 3-pin connector supports speed measurement and regulation on compatible motherboards. Buyers who need higher airflow or PWM control should look elsewhere.

Build integration

The frame measures 120 by 120 by 25 mm with a 10.5 cm hole spacing that matches standard 120 mm mounting points. It draws 0.18 A at 12 V for 1.44 W input power, so it adds minimal load to a 12 V rail. The 3-pin interface plugs directly into a motherboard header; on many boards it will run at full speed, which remains very quiet. Builders needing a 4-pin PWM header or a thinner profile cannot use this model.

Sustained-load behaviour

At full speed the fan delivers 58 Pa of static pressure to push air through restrictive grilles or filters continuously. The low 11 dB acoustic output stays consistent during extended operation, making it suitable for always-on servers. The sleeve-bearing design and 160 g weight indicate a focus on long-term reliability rather than peak performance. Users requiring variable speed curves tied to temperature sensors will not get that function from the 3-pin connection alone.